Students and other opponents of Serbia's populist president are gearing up for a major rally in the capital over the weekend as momentum builds in favor of their demands for major changes in the Balkan country.

BELGRADE, Serbia (AP) — Several hundred student protesters have blocked Serbia's public television station building in Belgrade as tensions are soaring in the Balkan country days ahead of a planned large rally over the weekend billed as an endgame in months of anti-government demonstrations.

Tensions were rising in Serbia days ahead of a mass anti-corruption protest as ultranationalist backers of the government flocked to the capital, sparking concerns of a confrontation between the rival camps.